I did matchmaking with a group of 3friends for 30hrs+ of games played.
HERE IS a PROBLEM
Let's say player A,B and C
-B is the only one who always team up with A or C
-A and C are never team up once
I tried to change inviter and change order while team up (B,A,C or C,A,B or A,C,B ....) BUT the result has never changed. B always team up with A or C.
I thought it should be completely random but it's not.
I'm curious how is matchmaking work?